 <?php foreach ($userInfo as $k=>$v):?>
                <tr>
                <td>{$v['user_name']}</td>
                <td><?php echo date("Y-m-d H:i:s",$v['add_time'])?></td>
                <td><?php echo date("Y-m-d H:i:s",$v['last_login'])?></td>     
                <td></td>
           </tr>
           <?php endforeach;?>